CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Ruixiang Wang,Huanhuan Dong,Xueyi Li,Li Zhou,Wenkun Zhu,Tao Chen
Semiconductor-based photocatalytic materials have been widely used in photoreduction uranium systems. However, semiconductor-based materials still have some problems such as difficult recovery, few adsorption sites, poor stability, and large bandgap width. Based on this, we constructed 3D porous konjac glucomannan-derived carbon-encapsulated carbon-doped ZnO carbon aerogels (KC@C-ZnO-X) for U(VI) adsorption-photoreduction based on the gelling properties of Konjac glucomannan (KGM) and the unique structure of ZIF-8. The KC@C-ZnO-1.5 achieved the U(VI) removal rate of 93.5 % in 200 mg/L U(VI) solution and greatly weakened the photocorrosion of ZnO. And then the KC@C-ZnO-1.5 continued to maintain an outstanding U(VI) removal rate of 92.9 % after five cycles. Further characterization tests found that the role of 3D KGM-derived carbon aerogel (KC) encapsulation improves the stability of ZnO and carbon doping reduces the band gap width of ZnO. The mechanistic study showed that KC as the “skeleton” encapsulating C-ZnO not only enabled the catalyst to be recycled but also enhanced the photostability of ZnO. The synergistic effect of the C-ZnO and KC promoted photogenerated charge separation and facilitated the generation of ·O 2 − , leading to the further formation of the stable (UO 3 ·NH 3 ·H 2 O) crystalline phase.
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ELECTROCHIMICA ACTA
·
2023
·
IF 6.6
Erwei Tan,Wenjie Peng,Qihou Li,Ding Wang,Xinhai Li,Jianguo Duan,Huajun Guo,Guochun Yan,Jiexi Wang,Zhixing Wang
Polyethylene oxide (PEO)-based electrolytes are considered to be promising for all-solid-state battery, benefiting from the superior flexibility, excellent processability and well compatibility. However, the low ionic conductivity at room temperature and poor stability under high voltage limit their further application. Herein, ZIF-8@PVDF-HFP/PEO (PPZ) solid electrolyte was successfully prepared by facial electrospinning process. On one side, the cooperation of PVDF-HFP and ZIF-8 was benefit to decrease the crystallization degree of PEO and thus promoted the Li + transfer. Moreover, the in-situ formed LiF layer derived from the decomposition of PVDF-HFP protected the electrolyte from contacting directly with the electrode, contributing to a stable electrode/electrolyte interface. The results demonstrated that the electrochemical stability and mechanical property of PPZ electrolyte were significantly improved when compared to the bare PEO electrolyte. The tensile strength increased from 0.5 to 6.7 MPa and the Li + transference number enlarged from 0.17 to 0.48. More importantly, the assembled LCO(LiCoO 2 )||PPZ||Li all-solid-state battery delivered a discharge specific capacity of 144.7 mAh g -1 at 0.2 C, nearly 1.6 times than that of the LCO||PEO||Li (90.7 mAh g -1 ). Besides that, the retention maintained at 86.3 % even after 200 cycles, manifesting a long-term cycling stability. This work provides a new idea for the practical application of PEO under high voltage.
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DALTON TRANSACTIONS
·
2023
·
IF 4
Ruifeng Wang,Qiyuan Pan,Fang Li,Jingying Guo,Yaru Huo,Chao Xu,Manwen Xiong,Ziyong Cheng,Min Liu,Jun Lin
Caries as a result of acid demineralization is the most common oral microbial infection disease. Due to the small and complex intraoral operating space, it is challenging to completely remove Streptococcus mutans (S. mutans) and other cariogenic bacteria. As an intelligent acid-responsive photosensitive nanomaterial, O2-Cu/ZIF-8@Ce6/ZIF-8@HA (OCZCH) was chosen to adapt the anaerobic and acidic microenvironment to inactivate S. mutans. In this work, OCZCH not only has a regular nanomorphology under the SEM and TEM images but also has an intelligent acid responsiveness as evidenced by the release of Ce6 and oxygen. When excited by near-infrared light at 650 nm, Ce6 released reactive oxygen species (ROS) that act synergistically with internal oxygen to significantly enhance the antimicrobial therapeutic effect of photodynamic therapy (PDT). In vitro, antimicrobial experiments showed that OCZCH could achieve an impressive sterilization effect against S. mutans and the biofilm. Notably, the acid-producing ability of the bacteria was also significantly inhibited. Considering its oxygen-carrying photosensitizing properties, excellent responsiveness to acidic environments, and antimicrobial capacity under anaerobic conditions, OCZCH is considered an innovative candidate for clinical application in treating dental caries.
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PubMed
高影响因子
Surfaces and Interfaces
·
2023
·
IF 6.2
Ting Zhao,Hui Li,Xin Jia,Peng-Cheng Ma
Successful integration of ideal amounts of porous materials onto the fibrous substrate requires a subtle balance between the loading ratio and structural robustness. In this study, zeolitic imidazolate framework-8 (ZIF-8) crystals could be controllably coupled on the surface of the fibrous basalt fiber felt via a mild synthetic route with a combination of biomimetic mineralization and layer-by-layer growth. Specifically, by regulating the deposition time and the number of growth cycles, a high loading ratio of 47.1% for ZIF-8 could be achieved without sacrificing the strength of the substrate. The remarkable stability of the composite against varied environmental factors such as high temperature, humidity, and solution corrosion circumstances were confirmed which could be attributable to the ultra-stability of single components and strong bonding between them. The high-quality loadings of the ZIF-8 ensured the fiber composite with abundant porosity, featuring a considerable specific surface area of 822 m 2 /g, which made it a promising candidate as a high-effective pollutant adsorbent. The maximum iodine vapor capacity of the optimal sample could reach 3614 mg/g. The mechanism of iodine adsorption was further explored in kinetics and thermodynamics aspects. This study is projected to overcome the defect of the MOF powder in the real application and further outline a facile method for the construction of MOF-fiber composite in a controllable manner.
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POLYHEDRON
·
2023
·
IF 2.6
Geng Zhang,Yuanyuan Wang,Xueqin Wang,Bolong Jiang,Yanxiu Liu,Hua Song
Zeolitic imidazolate frameworks (ZIFs) have been widely applied in many research fields, such as catalysts and adsorption. To meet the needs of scale applications, the development of simple, rapid and high-yield synthesis is a great necessity. In this work, a novel and facile strategy for the rapid synthesis of micro-mesoporous ZIF-8-H at room temperature within a very short time of 16 min using inexpensive quaternary ammonium base (tetramethylammonium hydroxide pentahydrate, TMAH) as a template was proposed. Results showed that in addition to significantly shortening crystallization time, the TMAH template also induced abundant mesopores for ZIF-8-H, which can improve the adsorption rate and fully use the adsorption active sites. More importantly, the ZIF-8-H yield of the proposed strategy is 3.6 times more than that of the conventional method, which is conducive to the realization of large-scale production. Among ZIF-8-H- x - t , ZIF-8-H-0.8-16 prepared with TMAH/Zn 2+ molar ratio x of 0.8 and reaction time t of 16 min exhibited the highest MB removal effectiveness of 96.3 ± 0.8%, a remarkable increase of 127% compared to ZIF-8-M prepared by conventional method (42.5 ± 0.9%). Additionally, the MB adsorption onto ZIF-8-M and ZIF-8-H-0.8-16 fitted well with the pseudo-first-order kinetics model and Langmuir isothermal model, suggesting the monolayer adsorption behavior is dominant. The ZIF-8-H-0.8-16 showed a maximum adsorption capacity of 47.90 mg/g, which is higher than that of ZIF-8-M.
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PROGRESS IN ORGANIC COATINGS
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2023
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IF 6.6
Nanqi Shi,Haiyan Li,Xin Li,Hongxin Luo,Jiaying Jin,Jiayu Wang,Shuang Li
Two-dimensional hexagonal boron nitride (h-BN) has excellent corrosion resistance and barrier ability, showing unique advantages in the field of anti-corrosion. The h-BN was assembled with Zeolite imidazolate framework material (ZIF-8) and benzimidazole (BI), and an active filler (h-BN/ZIF-8@BI) with shielding and active corrosion resistance was prepared. Zeolite imidazolate framework material was in-situ grown on h-BN surface and loaded with benzimidazole (BI), prepared an active anticorrosive filler with high shielding property (h-BN/ZIF-8@BI). The microstructure, crystal form, element composition, corrosion inhibition ability and thermal stability of h-BN/ZIF-8@BI were studied. The barrier, corrosion inhibition and anti-friction properties of EP/h-BN/ZIF-8@BI combined with F51 epoxy resin were explored. EIS test shows that the corrosion inhibition efficiency of h-BN/ZIF-8@BI is as high as 81.8 %. The impedance modulus of the steel matrix protected by the composite coating was about 2 orders of magnitude higher than that of the control sample, showing excellent barrier ability. In addition, the salt spray test proves that the composite coating has excellent corrosion inhibition characteristics. Taber testing machine shows that the wear mass loss of EP/h-BN/ZIF-8@BI coating is 34.5 % lower than that of EP coating. This work provides a novel idea for the preparation of high barrier, active anticorrosive and wear resistant anticorrosive coatings, and provides a new horizon of the composite coatings.
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NEW JOURNAL OF CHEMISTRY
·
2023
·Vol. 48
·期 4
·1642-1649
·
IF 3.3
Xurong Zuo,Pengfei Liu,Qinhao Sun,Jiahui Huang,Yuwei Zhang,Xuecheng Zhu,Runqi Chen,Xiangyu Meng
Because anthrax spores are highly lethal to humans and animals as well as potential biological warfare agents, there is a great need for rapid, sensitive, and selective quantification of dipicolinic acid (DPA) as a biomarker for anthrax spores. Herein, we prepared a novel lanthanide-doped nanoprobe by coordination of Tb3+ ions with tannic acid (TA)-coated zeolitic imidazolate frameworks-8 (ZIF-8) (ZIF-8@Tb–TA). The proposed assay was derived from the unsaturated coordination of Tb3+ ions. In the presence of DPA, Tb3+ ions could be sensitized to emit inherent luminescence due to the energy transfer after coordination with DPA. The results illustrated that ZIF-8@Tb–TA could be used as a sensitive nanoprobe for detecting DPA with a broad linear range (0 μM to 12.0 μM), and the limit of detection (LOD) was 12.3 nM. Moreover, the specific recognition ability of DPA by ZIF-8@Tb–TA was much better than that of other interfering molecules. This study proposed a new strategy to establish lanthanide-functionalized nanoprobes for highly selective and sensitive detection of DPA.
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International Journal of Electrochemical Science
·
2023
·
IF 1.5
Meng Jiang,Lin Zhu,Zejun Zhang,Yijing Ai,Lina Zeng,Shuhai He,Lin Li,Wei Sun
In this article the ZIF-8 based metal-organic frameworks-derived porous carbon was mixed with aminated graphene to obtain the nanocomposite, which was used to modify the surface of glassy carbon electrode (GCE). SEM, XRD and FT-IR were used to characterize the nanocomposite, which exhibited the unique morphology with functional groups. The modified electrode was applied to the electrochemical detection of rutin. Compared with that of GCE, the current response of rutin increased obviously on the modified electrode. Square wave voltammetry was further applied to quantitative analysis of rutin with a linear relationship between the concentration and peak current in two sections from 0.25 to 0.7 μmol·L -1 and 0.7 to 1.5 μmol·L -1 with detection limit of 15 nmol∙L -1 . Consequently, the detection of real samples was realized by this method.
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CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Yaoxuan Li,Lihang Yan,Guanhua Liu,Huaxun Chen,Hao Zhao,Lihui Wang,Jing Gao,Yunting Liu,Xiaobing Zheng,Yanjun Jiang
Carbon capture, utilization and storage have become a hot topic in recent years, and enzymatic CO 2 reduction benefits from high selectivity, high efficiency and mild conditions making it promising. However, the low solubility of CO 2 , poor stability of free enzyme and high cost of coenzyme limit the application. Therefore, mesoporous silica nanoflower (SNF) was used to immobilize formate dehydrogenase (FDH) by electrostatic adsorption followed by the coating of a multifunctional zeolitic imidazolate framework (ZIF-8) layer by sequential coating of Zn 2+ and 2-methylimidazole (2-MeIm), thus obtaining a novel integrated nanocatalyst ZIF-8@FDH@SNF. Regulated by controlling the ratio of ligands, the ZIF-8 coating layer not only protected the enzyme and prevented leakage, but also increased the local CO 2 concentration using the imidazole group of ZIF-8 which improved the CO 2 adsorption by 34.5% compared with SNF. And the expensive NADH was regenerated by the coupled electrocatalysis. The optimized integrated nanocatalyst showed excellent stability and reusability. Highly efficient electroenzymatic CO 2 reduction was achieved with 1.38 mM formate yield after 3 h, 48.4% higher than that without ZIF-8 layer.
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CATALYSIS COMMUNICATIONS
·
2023
·
IF 3.7
Shubo Sun,Haihan Yu,Mingzhi Hua,Lina Zhang,Chaomin Gao,Xin Cheng
Promoting the effective separation of photo-generated charge carriers is vitally crucial to enhancing the photocatalytic performance. The piezo-phototronic effect, which could regulate the directional migration of photogenerated carriers, has been regarded as an effective strategy of separating carriers. Herein, the NaNbO 3 @ZIF-8 which possesses efficient carrier separation property is prepared to achieve significant increase of H 2 evolution rate (1.16 mmol g −1 h −1 ) under the coupling effects of ultrasonic vibration and light irradiation, which is 1.9 times than that of NaNbO 3 . This work provides a strategy for studying the promotion of carrier separation and promoting photocatalytic performance under an external field.
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JOURNAL OF NANOBIOTECHNOLOGY
·
2023
·Vol. 21
·期 1
·1-19
·
IF 10.2
Yang Jinpei,Wang Meng,Zheng Shuai,Huang Ruodong,Wen Ganjun,Zhou Pan,Wang Wenbo,Zhou Shihao,Jiang Xinlin,Liu Shuangjiang,Li Zhizhong,Ma Dong,Jiao Genlong
In the treatment of spinal cord injury (SCI), the complex process of secondary injury is mainly responsible for preventing SCI repair or even exacerbating the injury. In this experiment, we constructed the 8-gingerol (8G)-loaded mesoporous polydopamine (M-PDA), M@8G, as the in vivo targeting nano-delivery platform, and investigated the therapeutic effects of M@8G in secondary SCI and its related mechanisms. The results indicated that M@8G could penetrate the blood-spinal cord barrier to enrich the spinal cord injury site. Mechanism research has shown that all of the M-PDA,8G and M@8G displayed the anti-lipid peroxidation effect, and then M@8G can inhibit the secondary SCI by suppressing the ferroptosis and inflammation. In vivo assays showed that M@8G significantly diminished the local injury area, reduced axonal and myelin loss, thus improving the neurological and motor recovery in rats. Based on the analysis of cerebrospinal fluid samples from patients, ferroptosis occurred locally in SCI and continued to progress in patients during the acute phase of SCI as well as the stage after their clinical surgery. This study showcases effective treatment of SCI through the aggregation and synergistic effect of M@8G in focal areas, providing a safe and promising strategy for the clinical treatment of SCI.
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International Journal of Electrochemical Science
·
2023
·
IF 1.5
Huimin Yang,Xin Liu,Jihui Wang,Wenbin Hu
The following study is conducted to improve the corrosion resistance of magnesium alloy. First, ZnAl layered double hydroxide (ZnAl LDH) film was prepared on AZ61 magnesium alloy by using hydrothermal method. Then, as-prepared ZnAl LDH was put into 2-methylimidazole (2-mIm) solution to synthetize ZIF-8 film (ZIF-8/LDH). Finally, ZIF-8/LDH film synthesized ZIF-8-DMBIM film (ZIF-8-DMBIM/LDHs) via a shell-ligand-exchange-reaction in the methanol solution containing 5, 6-dimethylbenzimidazole (DMBIM). The surface morphology, structure, and composition of the composite film were observed and determined by scanning electronic microscopy, X-ray diffraction, Fourier transform infrared spectroscopy, and energy-dispersive X-ray spectroscopy. The wettability of composite film was measured by using a water contact angle meter, and the corrosion resistance of the composite film was estimated by the polarization curve and electrochemical impedance spectroscopy techniques. Results show that the prepared ZIF-8-DMBIM/LDH composite film has a dense hexagonal plate morphology with a two-layer structure and a thickness of 3.5 μm. Compared with ZnAl LDH and ZIF-8/LDH films, ZIF-8-DMBIM/LDH composite film has a high contact angle (115.7°), low corrosion current density, and high corrosion potential and polarization resistance due to its near-smooth surface, dense two-layer structure, and hydrophobic characters.
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